Software⏱️ 3 min read📅 2026-06-19

How to Fix: Vagrant network is not active error

Vagrant network issue fix for kvm machine with ubuntu.

Quick Answer: Check the Vagrantfile for correct network configuration and ensure the 'vagrant' network is defined in the libvirt configuration.

Vagrant users are experiencing an error when attempting to create a KVM machine with Ubuntu using Vagrant. The error message indicates that the network 'vagrant' is not active, which is causing the issue. This problem affects users who have installed the Vagrant-KVM plugin and have set up their project and Vagrant file correctly.

This error can be frustrating as it prevents users from successfully creating a virtual machine with Vagrant. However, by following the steps outlined in this troubleshooting guide, users should be able to resolve the issue and get back up and running.

🔍 Why This Happens

  • The primary reason for this error is that the 'vagrant' network is not enabled on the host machine's KVM driver. This can occur if the 'vagrant' network configuration is not properly set up or if there are issues with the KVM driver itself.
  • Another possible cause is that the Vagrant-KVM plugin is not compatible with the latest version of KVM, which may be causing the error.

🔧 Proven Troubleshooting Steps

Enabling the 'vagrant' Network

  1. Step 1: Step 1: Open the KVM driver configuration file and add the following line to the network configuration section: ``. This will enable the 'vagrant' network on the host machine.
  2. Step 2: Step 2: Restart the Vagrant-KVM plugin by running the command `vagrant plugin restart vagrant-kvm` in your terminal. This will reload the plugin and pick up any changes to the configuration file.
  3. Step 3: Step 3: Try running `vagrant up` again to see if the error persists.

Updating KVM Driver

  1. Step 1: Step 1: Update your KVM driver to the latest version by running the command `sudo apt-get update && sudo apt-get install libvirt-bin`. This will ensure that you have the latest version of the KVM driver, which may resolve compatibility issues with the Vagrant-KVM plugin.
  2. Step 2: Step 2: Check if there are any known issues or bugs in the KVM driver by visiting the official Libvirt documentation and searching for any known issues related to the 'vagrant' network.

💡 Conclusion

By following these steps, users should be able to resolve the 'Vagrant network is not active' error and successfully create a KVM machine with Ubuntu using Vagrant. If you continue to experience issues, it may be helpful to consult the official Vagrant-KVM plugin documentation or seek further assistance from the Vagrant community.

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